獲取瀏覽器url參數

 //獲取瀏覽器url參數
    var methods ={
        getQueryString: function (name) {
            var reg = new RegExp('(^|&)' + name + '=([^&]*)(&|$)', 'i');
            var r = location.search.substr(1).match(reg);
            if (r != null) {
                return unescape(r[2]);
            }
            return null;
        }
    };
//調用方法：window.location網址后加上 url?userid=11&name=n1
alert(methods.getQueryString('userid'));